/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2021 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   This program is free software: you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version. This program is distributed in the
 *   hope that it will be useful, but WITHOUT ANY WARRANTY; without
 *   even the implied warranty of MERCHANTABILITY or FITNESS FOR
 *   A PARTICULAR PURPOSE. See the GNU General Public License
 *   for more details. You should have received a copy of the GNU General
 *   Public License along with this program. If not, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.client.configuration.getmap.choise.widget.simple;

import org.geosdi.geoplatform.gui.client.configuration.getmap.choise.widget.kvp.*;
import com.extjs.gxt.ui.client.event.ComponentEvent;
import com.extjs.gxt.ui.client.event.KeyListener;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.layout.FormData;
import com.extjs.gxt.ui.client.widget.layout.FormLayout;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Timer;
import java.util.logging.Logger;
import javax.inject.Inject;
import org.geosdi.geoplatform.gui.client.configuration.getmap.choise.dispatcher.IWmsGetMapDispatcher;
import org.geosdi.geoplatform.gui.client.i18n.LayerModuleConstants;
import org.geosdi.geoplatform.gui.client.puregwt.getmap.event.WmsGetMapDisableStatusEvent;
import org.geosdi.geoplatform.gui.client.puregwt.getmap.event.WmsGetMapIncorrectStatusEvent;
import org.geosdi.geoplatform.gui.client.widget.form.LoadWmsGetMapFromUrlWidget;
import org.geosdi.geoplatform.gui.configuration.GPSecureStringTextField;
import org.geosdi.geoplatform.gui.shared.util.GPSharedUtils;

/**
 * @author Nazzareno Sileno - CNR IMAA geoSDI Group
 * @email nazzareno.sileno@geosdi.org
 */
public class SimpleUrlTextFields extends LayoutContainer {

    private final static Logger logger = Logger.getLogger("");

    @Inject
    private IWmsGetMapDispatcher wmsGetMapDispatcher;
    @Inject
    private WmsGetMapIncorrectStatusEvent incorrectStatusEvent;
    @Inject
    private WmsGetMapDisableStatusEvent disableStatusEvent;
    private final NotificationPlugin notificationPlugin;
    //
    private final GPSecureStringTextField urlTextField = new GPSecureStringTextField() {

        @Override
        public void onBrowserEvent(Event event) {
            super.onBrowserEvent(event);
            switch (event.getTypeInt()) {
                case Event.ONPASTE:
                    event.stopPropagation();
                    fireDelayed();
                    break;
            }
        }

    };
    private final GPSecureStringTextField layerTextField = new GPSecureStringTextField() {

        @Override
        public void onBrowserEvent(Event event) {
            super.onBrowserEvent(event);
            switch (event.getTypeInt()) {
                case Event.ONPASTE:
                    event.stopPropagation();
                    fireDelayed();
                    break;
            }
        }

    };

    @Inject
    public SimpleUrlTextFields(KvpUrlNotificationPlugin theNotificationPlugin) {
        this.notificationPlugin = theNotificationPlugin;

        super.addPlugin(notificationPlugin);
        setWidgetProperties();
    }

    protected final void setWidgetProperties() {
        super.setLayout(new FormLayout());
        super.setWidth(240);

        urlTextField.setFieldLabel(LayerModuleConstants.INSTANCE.urlLabelText());
        layerTextField.setFieldLabel(LayerModuleConstants.INSTANCE.SimpleUrlTextFields_layerNameText());

        urlTextField.sinkEvents(Event.ONPASTE);
        layerTextField.sinkEvents(Event.ONPASTE);

        KeyListener keyListener = new KeyListener() {

            @Override
            public void componentKeyUp(ComponentEvent event) {
                if ((urlTextField.getValue() == null) && (event.getKeyCode()
                        == KeyCodes.KEY_BACKSPACE)
                        || (event.getKeyCode() == KeyCodes.KEY_DELETE)) {
                    resetFields();
                }
            }

            @Override
            public void componentKeyPress(ComponentEvent event) {
                if ((event.getKeyCode() == KeyCodes.KEY_ENTER)
                        && checkUrl().isEmpty()) {
                    wmsGetMapDispatcher.verifyUrl(true, buildGetMapURL());
                } else {
                    fireDelayed();
                }
            }

        };

        urlTextField.addKeyListener(keyListener);
        layerTextField.addKeyListener(keyListener);
        super.add(urlTextField, new FormData("100%"));
        super.add(layerTextField, new FormData("100%"));
    }

    public void resetFields() {
        urlTextField.clear();
        layerTextField.clear();
        LoadWmsGetMapFromUrlWidget.fireWmsGetMapFromUrlEvent(
                disableStatusEvent);
        notificationPlugin.resetPlugin();
    }

    private String checkUrl() {
        String result = "";
        if (!GPSharedUtils.isNotEmpty(urlTextField.getValue())) {
            result = LayerModuleConstants.INSTANCE.SimpleUrlTextFields_checkURLEmptyText();
        } else if (!urlTextField.getValue().startsWith("http")
                && !urlTextField.getValue().startsWith("https")) {
            result = LayerModuleConstants.INSTANCE.SimpleUrlTextFields_checkURLProtocolText();
        } else if (!GPSharedUtils.isNotEmpty(layerTextField.getValue())) {
            result = LayerModuleConstants.INSTANCE.SimpleUrlTextFields_checkLayerNameText();
        }
        return result;
    }

    private void fireDelayed() {
        Timer t = new Timer() {

            @Override
            public void run() {
                String statusMessage = checkUrl();
                if (statusMessage.isEmpty()) {
                    wmsGetMapDispatcher.verifyUrl(false, buildGetMapURL());
                } else {
                    incorrectStatusEvent.setStatusMessage(statusMessage);
                    LoadWmsGetMapFromUrlWidget.fireWmsGetMapFromUrlEvent(
                            incorrectStatusEvent);
                }
            }

        };
        t.schedule(2);
    }

    private String buildGetMapURL() {
        StringBuilder getMapURL = new StringBuilder(this.urlTextField.getValue());
        getMapURL.append("?service=WMS&version=1.1.0&request=GetMap&layers=");
        getMapURL.append(this.layerTextField.getValue());
        getMapURL.append("&bbox=-179,-89,179,89&width=50&height=50&srs=EPSG:4326&format=image/png");
        return getMapURL.toString();
    }

    public String getLayerDatasource() {
        return this.urlTextField.getValue();
    }

    public String getLayerName() {
        return this.layerTextField.getValue();
    }

}
